Pulley.



narran sTAriis .PATENT onirica.

`CHABLES L. BERGENTHAL AND LEROY KELLER, OF WICHITA, KANSAS.

PULLEY.

To all whom it may concern:

Be it known'that we, CHARLES L. BERGEN- 'riiAL and LEROY KELLER,citizens of the United States, residing at Wichita, in the county `ofSedgwick and State of Kansas, have invented certain new and` usefulImprovements in Pulleys; and we do hereby declare the followin to be afull, clear, and ex-act description of `the invention, such as willenable others skilled Vin the art to which it appertains to make and usethe same.

Our invention relates to pulleys.

In designing our pulley, special attention y has been given to therequirements for high speed pulleys. The consideration of firstimportance in constructing a high speed pulley is to prevent the beltfrom slipping thereon. Other objects which we have had in constructingour pulley are to insure uniform wear all around the same, to providefor Irenewing the lagging without removing the pulley from its shaft,and to provide a pulley which is inexpensive to manufacture.

Iny order to prevent the belt from slipping, we employ for the laggingon our pulley wooden blocks set in place so that the grain of the wood,of which each block is made, extends radially of the pulley whereby theends of the grain of the wood lagging are presented onthe wholebelt-engaging surface of the pulley. The ends of the grain of wood willnot wear smooth, consequently the belt will not slip. The wooden blocksare removably retained upon the metal core "or sleeve of the pulley bymeans of longitudinally extending tie rods and metal rings,

the latter engaging ,angular grooves in the Lmeeting faces of adjacentrows of said blocks. f

The pulley as a whole is simple in construction and can be'cheaplymanufactured.

The invention also consists in the features of construction andcombinations. of parts hereinafter described, illustrated in theaccompanying drawing, and specified in the appended c aims. l

Figure l is a side elevation of one of our complete ulleys. Fig.' 2 isan end view thereof. ig. 3 is a central longitudinal sectionalyievnofthe pulley, and Fig. 4 is a Referring more particularly to the drawing,1 designates the metal core or sleeveof the pulley whichis preferablymade in skele-.

a shaft. The outer surface of the core or sleeveis cylindrical. At oneend thereof, an integral outwardly extending flange 5 lis formed. Theother end of the sleeve lhas its edge notched at 6 for the purpose ofretaining a separable flange 7 lagainst turning thereon, said flange 7beingl provided with lugs 8 which engage the notches 6.

The lagging or jacket ofthe Pulley consists of the plurality of rows-ofblocks 9 extending aroundthe sleeve or core. All of the blocks arepreferably of a uniform size and those ineach row are preferably a1'-ranged to break joints with those inthe rows at either side thereof. Themeeting ends of vthe blocks in each alternate row are preferablyarranged in line with one another longitudinally. Each block is providedwith an'opening or passage y10 through the center thereof and a groove11, which in cross section is equal to one-half of the passage 10, ineach of its ends. upon the core or sleeve by longitudinal tie 'rods 12which are passed through holes 13 and 14, Vformed respectively in theintegral Patented Mar. .14, 1911.

The blocks are retainedflange 5 and separable flange 7, and through;v

the openings 10 and grooves 1'1 in the blocks.

By reason of the arrangement ofthe blocks in the several rows, asalready described, it will be seen that each tie rod extends throughcentral openings;l 10 in blocks of alternate rows and engages the'grooves 1l `in the meeting faces of blocks in the other rows, the twogrooves 11 in adjacent blocks forming together a passage (similar to theassages 10 in the middle of the blocks. T e tie rods not only retain thelaggin blocks upon the` core or sleeve of the pul ey but also secure theseparable flange 7 in place with its lugs 8 engaging the notches 6 inthe sleeve whereby said lflange is locked against turning on the sleeve.The lagging blocks are further retainedI upon the core of the pulley,and secured against centrifugal force which tends to throw themoutwardly when the pulley is revolved rapidly, by means of metal ringsl5 which are fitted in grooves 16 in the meeting lateral faces of theblocks in the several rows, as clearly illustrated 1n Figs. 3 and 4.Each block t erefore has a section of the groove 16 formed in itslateral faces, except the blocks in the two end rowswhich,

of course, only have this groove formed in their inner lateral faces.The rings 15 are made round in cross section which adds greater strengthto the pulley than flat bands, especially when the pulley is driven at ahigh speed.

From the foregoing description, it will be understood that the blocksconstituting ther lagging or jacket of the pulley may be readily removedfor renewing, etc., by talring out the tie rods and removing theseparable flange. It will also be understood that blocks of differentsizes may be used on the same cere thus varying the diameter of thepulley. Special attention is called to the fact that the periphery 0rbelt engaging surface of the pulley will not wear smooth because thebelt contacts with the ends of the grain of each wooden block.Furthermore, the resistance to wear is equal at every point on theperiphery ofthe pulley, insuring even wear all around it.

We claim:

l. A pulley comprising a core or sleeve having an integral ange a't oneend and notches in its other end, of lagging on the surfa of thesleevefa separable flange having lugs engaging the notches in thesleeve, and tie rods passed through both flanges and the lagging.

2. A pulley comprising a core or sleeve, flanges at the ends of saidsleeve, lagging mounted on the sleeve between said flanges, said laggingconsisting of. blocks arranged in rows and breaking joints, each blockhaving a passage through the center thereof and groovesv in its ends,and tie rods passed through theflanges and the passages and grooves insaid blocks for the purpose specified. I

3. A pulley comprising a core or sleeve, flanges at the ends of saidsleeve, lagging mounted on the sleeve between said flanges, said laggingconsisting of blocks arranged in rows and breaking joints, the grain ofthe wood ineach bloek'extending radially eeaeei 4. Ai. pulley comprisinga core or sleeve,

flanges at the ends of said sleeve, lagging mounted on the surface ofthe sleeve between saidfianges, saidlagging consisting of blocksarranged in rows and breaking joints, each block having a centralpassage and grooves 1n its ends, the grooves in the meeting ends of theblocks lin alternate rows,

being in longitudinal yalinement with the central passages in the blocks4in the other rows, and tie rods passedy through the flanges and thepassages and'grooves in. the blocks for the purpose specified.A

5. A pulley comprising a core orsleeve, lagging mounted on saidsleeve,said lagging consisting of blocks arranged in rows and havinggrooves in their, lateral faces, means to retain said blocks againstlongitudirnxl movement, and rings engaging the grooves in the adjacentlateral faces of the rows of blocks for retaining thesan'ie againstoutward movement. I

6. A pulley comprising a core or sleeve, lagging mounted on said sleeve,said laggingconsisting of blocks arranged in rows 'and having grooves intheir lateral faces, means yto retain said blocks against longitudinalmovement, and rings, round in cross section, engaging the grooves in theadjacent lateral faces of the rows 'of blocks for retaining the sameagainst outward movement.

ln testimony whereof, we afliX our signa` tures, in presence of twowitnesses.

HAS; L. BERGENTHAL. LEROYYKELLER. Witnesses:

' W. M. DEDRICK,

Gr. A. Snor.

